qdebug

When running my Qt5 application on linux, I don't see any output from qDebug, qWarning, qCritical or qFatal. I know that I can use qInstallMsgHandler to install a message handler and see them, but this is rather heavyweight. I just want to check the qWarning log to see if there is any signal that mis-connected. Is there a way to look at this log? A special command-line option, an environment variable? I think I remember that in the past, everything was printed to stderr, perhaps that's a Qt5 change? Please do not make the mistake of assuming that qDebug, qWarning, qCritical and qFatal always

I'm using a lot of qDebug() << statements for debug output. Is there any cross-platform way I can redirect that debug output to a file, without resorting to shell scripts? I'm guessing that open() and dup2() will do the job in Linux, but will it work compiled with MinGW in Windows? And maybe there is a Qt way to do it? Nawaz You've to install a message handler using qInstallMsgHandler function, and then, you can use QTextStream to write the debug message to a file. Here is a sample example: #include <QtGlobal> #include <stdio.h> #include <stdlib.h> void myMessageOutput(QtMsgType type, const